Trolley-wheel.



PATENTBD MAR. 24, 1908.

D. D. GRANT. TROLLEY WHEEL. APPLIUATION FILED FEB. 11. 1907.

All.

DANIEL D. GRANT, OF PITTSFIELD, MASSACHUSETTS.

TROLLEY-WHEEL.

Specification of Letters Patent.

Patented March 24, 1908.

Application filed February 11,1907. Serial No. 356,839.

To all whom it may concern:

Be it known that I, DANTEL D. GRANT, a citizen of the United States, residing at Pittsfield, in the county of Berkshire and State of Massachusetts, have invented a new and useful Trolley-Wheel, of which the following is a specification.

This invention relates to trolley wheels and its object is to rovide a simple and durable device of this c aracter having a roller bearing of simple and com act form the parts of which are securely hel against displacement and are protected against Ithe admission of dust, etc., thereto.

With this and other objects in view the invention consists of certain novel features of construction and combinations of parts which will be hereinafter more fully described and pointed out in the claims.

In the accompanying drawings isshown the preferred form of the invention.

In said drawings: Figure 1 is a view partly 'in side elevation 4and partly in section of a wheel constructed in accordance with the present invention; and Fig. 2 is a central transverse section through the Wheel.

shown particularly in Fi 2 and are refer'- i ably screwed into one of t e plates so t at by Referring to the figures by characters of reference, 1 is the axle of the wheel on which is keyed or otherwise secured a cylindrical core 2. This core is surrounded by the Wheel v3 which is in the form of a ring, the interior diameter of which is considerably greater than the diameter of the core 2 so as to premit anti-friction rollers 4 to be placed between the ring and the core. These rollers extend entirely around the core and are held a ainst end movement by guard disks or ates 5 which are secured upon opposite Faces of the core by means of bolts or screws 6. -These screws extend through o enings in the guard plates and also through t e core as turning the screws in one dlrection the two plates may be drawn tightly against opposite vent the admission of dust, etc., into the space between the ring and the core.

It Will be seen that a Wheel constructed in the manner herein described will rotate freely upon its axle an'd its construction is so simplel that repairs will seldom if ever be necessary. Should one or more of the rollers become broken or worn it can be easily re moved by detaching one of the guard plates.

What is claimed 1s:

In a trolley Wheel, the combination with an axle and a core secured thereon; of a ring surrounding the core and constituting the Wheel body, the sides of said ring being countersunk, a circular guard plate upon one face of in, a similar plate upon the opposite face of the core and having o enings therein, the peripheral portions of tlie two plates being disposed within the countersunk portions of the ring, bolts extending through the yopenings in the last mentioned plate and engaging the threads in the first mentioned plate, said bolts extendin through the coreand disposed to bind t e plates thereon, said plates constituting means for preventing independent lateral movement of the corel and ring, and a continuous series of anti-friction rollers inter osed between the core and ring and movab e around the core, said guard plates being disposed to hold the rollers against longltudinal movement.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

DANIEL D. GRANT.

Witnesses:

ROBERT BRUCE DONALDSON, EDWARD T. SoULLY.

ythe core and having threaded-openings there- L 

